Phase IV (1974)

PG  |   |  Horror, Sci-Fi, Thriller  |  September 1974 (USA)
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Ratings: 6.6/10 from 4,433 users  
Reviews: 71 user | 67 critic

Desert ants suddenly form a collective intelligence and begin to wage war on the desert inhabitants. It is up to two scientists and a stray girl they rescue from the ants to destroy them. ... See full summary »



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Complete credited cast:
Alan Gifford ...
Robert Henderson ...
Helen Horton ...


Desert ants suddenly form a collective intelligence and begin to wage war on the desert inhabitants. It is up to two scientists and a stray girl they rescue from the ants to destroy them. But the ants have other ideas. Written by Niz

Plot Summary | Add Synopsis


Ravenous Invaders Controlled by a Terror Out in Space Commanded to Annihilate the World! See more »


PG | See all certifications »

Parents Guide:






Release Date:

September 1974 (USA)  »

Also Known As:

Du tror inte dina ögon  »

Filming Locations:


Company Credits

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Technical Specs


Sound Mix:



Aspect Ratio:

1.85 : 1
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Did You Know?


According to actor Michael Murphy, actress Lynne Frederick was required to wear a sort of corset during filming so that she would be more flat-chested. Kendra, the character she played, was supposed to be about 16, four years younger than she was at the time, and the director wanted to minimize her figure. See more »


During one of the scenes inside the dome, Lynne Frederick speaks with a English accent instead of the American accent she uses during the rest of the film. See more »


Dr. Ernest D. Hubbs: You did your major work applying game theory to the language of killer whales.
James R. Lesko: Well, it seemed cheaper than applying it to roulette
Dr. Ernest D. Hubbs: Did you actually *succeed* in making positive contact with the whales?
James R. Lesko: Only with the emotionally disturbed.
Dr. Ernest D. Hubbs: How were you able to determine that?
James R. Lesko: We talked!
See more »

Crazy Credits

The Paramount logo is not shown at the start of the film, and there are no opening credits. See more »


References Un Chien Andalou (1929) See more »

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User Reviews

Amazing mood.
3 January 2007 | by (United States) – See all my reviews

Despite the dated quality of some elements, particularly the costumes this picture is, in my book, the best killer bug movie of all time. Through the use of an almost nature documentary style of photographing the ants, we really get a new perspective on the film's six-legged antagonists. There's something totally raw about the way these ants act and are shot alongside the inexorable, almost plodding pace of the piece that makes Phase IV seem amazingly, terrifyingly real.

The performances by the human actors are very much in the wooden, gee-whiz style of older sci-fi but here it works. The ants are a silent, almost invisible, killer. Their creeping terror, when cut against the classic characterization of the chisel-chinned hero and the bearded professor, illustrates that the best that humanity has to offer against the threat might not be enough.

A hard-to-find favorite.

18 of 19 people found this review helpful.  Was this review helpful to you?

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